Week - 8 - Morphing

AIM:

To test and apply various morphing techniques to given project models and explain the procedure of same and its applications in industries.

MORPHING:

Morphing is an advanced CAE modelling technique used to modify the shape of mechanical parts and assemblies without returning in the CAD system, which is time consuming and generates unexpected modelling preparation stages.

The procedure is simple and fast, keeps the desired mesh pattern unchanged and allows meshed model parametrization. The benefits of this CAE modelling technique are enforced by the link with the optimization procedures in order to shorten the product development time. The procedure is a promising step for future implementation of virtual reality in mechanical engineering design.

OBJECTIVE:

• Importing the required geometry into ANSA
• Clean up the geometry until no topological error is found
• Use required tools in ANSA and morph the geometry

MORPHING:

ANSA encompasses a full fledged morphing menu which is completely integrated with ANSA interface and doesn’t require any additional module installation .The function of the morphing menu can be used to efficiently reshape both FE geometry based models

• DOMAIN MORPHING

Domain morphing is performed via boxes that are created around a particular part or assembly that the user intends to morph .The movement of the morphing boxes control points defines the morphing operations on the entities inside the morph box. This type of morphing can be applied to both FE and geometry based models

• DIRECT MORPHING

ANSA direct morphing features gives the user the ability to efficiently modify a part locally without having to create morphing boxes .This method is extremely useful in creating local modification on single parts .Creation of depression surface fitting certain FE part features to new target geometry moving selected features along the contour of surface and also the ability to freeze elements during the morphing process are some of the direct morphing abilities

• PARAMETRIC MORPHING

The desired morphing actions can be saved as parameters which can be accessed in batch mode. Users can enforce desired shape changes by changing numerical input value for the appropriate parameter .This method of morphing is highly utilized for coupling of the morphing operations to a exterior optimizer. The scripting capability can be conjunction with ANSA parametric morphing functionality to deliver faster DOE models

• GEOMETRY MORPHING

ANSA brings to the CAE world its one of a kind tool for cad geometry morphing .This pioneering concept allows the user to utilize the inventory of the all the familiar FE morphing functions to perform equivalent operations in a cad environment on geometric entities

Application of Morphing-

1. In Automobile industries-

It is a very useful technique in small changes in designed model like change in structure or small changes in design of any parts and to fit in desired size or any aerodynamic changes.

2. Morphing in Aircraft-

A morphing aircraft can adapt its configuration to suit different types of tasks, which is also an important requirement of Unmanned Aerial Vehicles (UAV). The successful development of an unmanned morphing aircraft involves three steps that determine its ability and intelligent: configuration design, dynamic modelling and flight control.

3. In Ship Design-

Advancements in digitalisation and cyber-physical automation are opening up new frontiers in the marine industry such as autonomous shipping and smart manufacturing of ships. However, the progress in automating the ship design process which is still very human dependent, is slow. Evolutionary Algorithm and Morphing (HEAM) to enable a more intelligent and efficient ship design process. It maps the entire ship hull form into a genotype using Non-dominated Sorting Genetic Algorithm II (NSGA-II) and flexible modification
through morphing to create efficient designs for the hull form.

4. Morphing in Turbine design-

Morphing technique is used in design modification of turbine blades.

Procedure-

Part-1-Moprhing of foot plate:

• First we have open the modal in Ansa software.

• Since the above model is not connected properly as we can see single cons so we have to clear it.

• For doing so go to topo module>>faces>>topo and select he model and do middle mouse click.

• Now we have to do the geometry clean-up of the model and the start for morphing.

• For geometry clean-up go to Tools>>checks>>geometry>>click execute and if no error found hit ok.

• Now go to morph module and Boxes>>click on new>>ortho>>select the required are and hit ok.

• A morph volume will be created which can be hidden and can be retrieved from data base.

• Now go to Box morphing>>move>>select nodes to move>>by free MV we can move the model as per our requirement.

• One thing to be noticed that when we try to morph it before that one window will appear where the geometry check need to be performed and there status should be either in or out.

Similarly we can do for other areas by same procedure as mentioned above

After Morphing:

Part-2-Morphing on hand rest:

• First we have open the modal in Ansa software

• Since geometry is connected so we will straight away move for geometry check.

• For geometry clean-up go to Tools>>checks>>geometry>>click execute and if no error found hit ok.

• We have to Increase the Height of the Dog houses and Ribs. (Refer Red annotations in the below image to understand what are Dog houses and Ribs).

• Now go to morph module and Boxes>>click on new>>ortho>>select the required are and hit ok.

• A morph volume will be created which can be hidden and can be retrieved from data base.

• Now go to Box morphing>>move>>select nodes to move>>by free MV we can move the model as per our requirement.

• One thing to be noticed that when we try to morph it before that one window will appear where the geometry check need to be performed and there status should be either in or out.

• Similarly we have to create morph boxes for all remain dogs and ribs and then one by one have to increase the height of it.

• Final result is as shown below

Leaning Outcomes:

• Understood the basic idea of what is morph how it is important to us and its application.
• Got knowledge about how to do morph and basic techniques in ANSA.

Conclusion:

By this project we come to know about morphing and its different techniques of doing in ANSA software.